<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
     *{
         padding: 0px;
         margin: 0px;
     }

     div{
         border:1px red solid;
         width: 200px;
         height: 200px;
         
     }
     .one{
        margin-bottom: `00px;
     }
     .two{
        margin-top: 30px;
     }

     

    </style>
</head>
<body>
 
     <div class='one'></div>
     <div class='two'></div>
    
</body>
</html>